GNRH1 and cryptorchidism: In another randomized, double-blind study investigating the efficacy of hCG (300 IU per week for 4 weeks) and GnRH analogues (1.2 mg/day for 28 days), it was detected that GnRH analogues were more effective than hCG treatment in 33 patients of ages 1-5 years with undescended testes (29 unilateral, 4 bilateral).